The only wiring harness we carry for the 1999 Pontiac Bonneville is the Upgraded Circuit Protected Taillight Converter Hardwire Kit, # 119175KIT. A T-one style connector is not available.
Installation of this kit is still very simple. Using the included circuit tester, you will test the wires behind each tail light and find the ones for brake lights, running lights, and left turn signal on the driver side, and right turn on the passenger side.
once you have found the correct wires they... view full answer...
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